/* Writes to a file through a mapping, and unmaps the file,
   then reads the data in the file back using the read system
   call to verify. */

#include <string.h>
#include <syscall.h>
#include "tests/vm/sample.inc"
#include "tests/lib.h"
#include "tests/main.h"

#define ACTUAL ((void *)0x10000000)

void test_main(void)
{
    int handle;
    mapid_t map;
    char buf[1024];

    /* Write file via mmap. */
    CHECK(create("sample.txt", strlen(sample)), "create \"sample.txt\"");
    CHECK((handle = open("sample.txt")) > 1, "open \"sample.txt\"");
    CHECK((map = mmap(handle, ACTUAL)) != MAP_FAILED, "mmap \"sample.txt\"");
    memcpy(ACTUAL, sample, strlen(sample));
    munmap(map);

    /* Read back via read(). */
    read(handle, buf, strlen(sample));
    CHECK(!memcmp(buf, sample, strlen(sample)),
          "compare read data against written data");
    close(handle);
}
